Chocolate centers that last longer

Hi

i do not usually deal in cream centered chocolates but I want to do a special series of products for a an upcoming show in February.

The problem I am having is that I cannot make these with ordinary ganache, I cannot afford to make these chocolates a few days before and since I do not have a retail location i'm stuck with unsold products.

What I would like are ideas for centers that could last for a while, like 2 months. I was thinking about caramel but I would like to have at least 6 choices.

any ideas ???

thanks !